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Summary: Protected Ctors | Protected Methods | Inherited Methods

# AbstractOwnableSynchronizer

`public abstract class AbstractOwnableSynchronizer`
`extends Object` `implements Serializable`

java.lang.Object
↳ | java.util.concurrent.locks.AbstractOwnableSynchronizer

Known direct subclasses AbstractQueuedLongSynchronizer, AbstractQueuedSynchronizer
AbstractQueuedLongSynchronizer | A version of `AbstractQueuedSynchronizer` in which synchronization state is maintained as a `long`.
AbstractQueuedSynchronizer | Provides a framework for implementing blocking locks and related synchronizers (semaphores, events, etc) that rely on first-in-first-out (FIFO) wait queues.

A synchronizer that may be exclusively owned by a thread. This class provides a basis for creating locks and related synchronizers that may entail a notion of ownership. The `AbstractOwnableSynchronizer` class itself does not manage or use this information. However, subclasses and tools may use appropriately maintained values to help control and monitor access and provide diagnostics.

## Summary

### Protected constructors
`AbstractOwnableSynchronizer()` Empty constructor for use by subclasses.

### Protected methods
`final Thread` | `getExclusiveOwnerThread()` Returns the thread last set by `setExclusiveOwnerThread`, or `null` if never set.
`final void` | `setExclusiveOwnerThread(Thread thread)` Sets the thread that currently owns exclusive access.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Protected constructors

### AbstractOwnableSynchronizer

    protected AbstractOwnableSynchronizer ()

Empty constructor for use by subclasses.

## Protected methods

### getExclusiveOwnerThread

    protected final Thread getExclusiveOwnerThread ()

Returns the thread last set by `setExclusiveOwnerThread`, or `null` if never set. This method does not otherwise impose any synchronization or `volatile` field accesses.

Returns
`Thread` | the owner thread

### setExclusiveOwnerThread

    protected final void setExclusiveOwnerThread (Thread thread)

Sets the thread that currently owns exclusive access. A `null` argument indicates that no thread owns access. This method does not otherwise impose any synchronization or `volatile` field accesses.

Parameters
`thread` | `Thread`: the owner thread

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